Knife



FIG. 1 is an isometric view of a new ornamental design for a knife;

FIG. 2 is a top view of the knife of FIG. 1;

FIG. 3 is a bottom view of the knife of FIG. 1;

FIG. 4 is a right side elevational view, the left side elevational view being a mirror image thereof, of the knife of FIG. 1; and,

FIG. 5 is a front elevational view, the rear elevational view being a mirror image thereof, of the knife of FIG. 1. 

CLAIM The ornamental design for a knife, as shown. 